If you have a Simpson 160 VOM and your 22.5V battery dies, instead of paying $12-25 for a new one, stack 13 AG10s and two AG12 1.5V button batteries in shrink wrap.
Battery Tester, For AA AAA 9V 1.5V Button Cell and batteries 35 pcs 709803514256 | eBay
Amazon.com: Cotchear 10pcs AG0 Coin Battery LR521 379 Button Cell Coin Alkaline Battery 1.5V for Watches Toys No Mercury : Health & Household
Varta batterijen oplaadbaar AA | Action.com
10 x eunicell ag12 / lr43 / g12 / sr43w 1.5v alkaline cell battery batteries new - Walmart.com
100 Alkaline Assorted Watch and Camera Battery Repair Kit Combo
in Stock】unique Toys Transformaton Ut R-03 R-03 Knight Warrior Movie Alloy Action Figure Robot Deformation Toys Without Base - Transformer/robot - AliExpress